Britain on Wednesday enhanced monitoring of flights from the central China city at the heart of a new SARS-like virus that has killed nine people and spread to the United States.

Public Health England also raised the risk level of an infection from ‘very low’ to ‘low’ due to the potential for human to human transmission.

‘From today, enhanced monitoring will be in place from all direct flights from Wuhan to the UK,’ the health service said in a statement.

Health teams will meet each of the three weekly direct flights from Wuhan to London ‘to provide advice and support to those that feel unwell’, it said.

Mandarin and Cantonese language-speaking staff will also be on hand.

‘The enhanced monitoring of direct flights will be kept under continuous review and expanded to other Chinese departure points if necessary,’ the statement said.

The coronavirus has caused alarm due to its similarity to SARS (Severe Acute Respiratory Syndrome), which killed nearly 650 people across mainland China and Hong Kong in 2002-2003.

The new virus is known to have infected hundreds, although doctors fear its true scale could be higher.

The United States on Tuesday confirmed its first case of a person with the new virus. European countries have not registered any cases to date.

London's Heathrow airport, which is Europe's busiest, said the stepped-up checks were ‘a precaution’.

‘We would like to reassure passengers that the government assesses the risk of a traveller contracting coronavirus to be low,’ a Heathrow spokesperson said.

Romanian health authorities on Wednesday also said they intend to introduce screening measures at airports.

Elsewhere in Europe, French Health Minister Agnes Buzyn, said authorities were monitoring the situation but not following the lead of nations such as Russia, which has put up posters telling passenger what to do in case of symptoms.

Such measures are not recommended by the World Health Organization, Buzyn said, and are ‘not very effective’.

German health authorities said they had also refrained from taking any measures at airports.